<template>
	<view>
		<!-- 搜索框 -->
		<view class="search-box">
		  <!-- 使用 uni-ui 提供的搜索组件 -->
		  <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		</view>
		<!-- 搜索列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
		  <view class="sugg-item" v-for="(item,i) in searchResults" :key='i' @click="gotoDetail(item)">
		    <view class="goods-name">{{item.goods_name}}</view>
		    <uni-icons type="arrowright" size="16"></uni-icons>
		  </view>
		</view> 
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
		  <!-- 标题区域 -->
		  <view class="history-title">
		    <text>搜索历史</text>
		    <uni-icons type="trash" size="17" @click="cleanHistory"></uni-icons>
		  </view>
		  <!-- 列表区域 -->
		  <view class="history-list">
		    <uni-tag :text="item" v-for="(item, i) in historys" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		  </view>
		</view>
	</view>
</template>


<script>
	export default {
		data() {
			return {
				timer:null,
				kw:'',
				searchResults:[],
				historyList: ['a', 'app', 'apple']
			};
		},
		onLoad(){
			this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
		},
		methods:{
			// input输入事件函数
			input(e){
				 clearTimeout(this.timer)
				  // 重新启动一个延时器，并把 timerId 赋值给 this.timer
				  this.timer = setTimeout(() => {
				    // 如果 500 毫秒内，没有触发新的输入事件，则为搜索关键词赋值
				    this.kw = e.valueOf()
				    // console.log(this.kw)
					this.getSearchList()
					this.saveSearchHistory()
				  }, 500)
			},
			async getSearchList(){
				if(this.kw.length === 0){
					this.searchResults = []
					return
				}
				
					
				const { data:res } = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
				if(res.meta.status !== 200)  return uni.$showMsg()
				this.searchResults = res.message
			},
			gotoDetail(item){
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
				})
			},
			saveSearchHistory(){
				// this.historyList.push(this.kw)
				const set = new Set(this.historyList)
				set.delete(this.kw)
				set.add(this.kw)
				this.historyList = Array.from(set)
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
				console.log(set)
			},
			cleanHistory(){
				this.historyList = []
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'../goods_list/goods_list?id=' + kw
				})
			}
		},
		computed:{
			historys(){
				return [...this.historyList].reverse()
			}
		}
	}
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top: 0;
  z-index: 999;
}
.goods-name {
      // 文字不允许换行（单行文本）
	white-space: nowrap;
      // 溢出部分隐藏
	overflow: hidden;
      // 文本溢出后，使用 ... 代替
	text-overflow: ellipsis;
	margin-right: 3px;
}
 .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;

    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
